EP 1167954 A4 20020918 - METHOD AND APPARATUS FOR DETECTING NEGATIVE ION IN WATER
Title (en)
METHOD AND APPARATUS FOR DETECTING NEGATIVE ION IN WATER
Title (de)
VEFAHREN UND VORRICHTUNG ZUM NACHWEIS NEGATIVER IONEN IN WASSER
Title (fr)
METHODE DE DETECTION D'IONS NEGATIFS DANS L'EAU ET DISPOSITIF CORRESPONDANT
Publication
Application
Priority
- JP 0001326 W 20000306
- JP 7900899 A 19990324
Abstract (en)
[origin: WO0057165A1] The invention provides a method and apparatus for detecting negative ions in water, which needs no replacement of ion-exchange resin and which is easy to operate and capable of low-cost measurements with accuracy. The apparatus for detecting negative ions in water comprises an electrolyzer including a cation-exchange membrane between an anode compartment with an anode plate and a cathode compartment with a cathode plate; a DC power supply unit for applying DC voltage between the anode and cathode of the electrolyzer; and an electric conductivity cell for measuring the electric conductivity of sample water. The anode compartment of the electrolyzer connects a channel for introducing sample water into the anode compartment and a discharge channel for discharging the electrolyzed water from the anode compartment, and the discharge channel is connected with the cathode compartment through the electric conductivity cell.
IPC 1-7
IPC 8 full level
C25B 9/00 (2006.01); G01M 3/18 (2006.01); G01N 27/06 (2006.01); G01N 27/10 (2006.01); G01N 30/00 (2006.01); G01N 33/18 (2006.01)
CPC (source: EP US)
G01N 27/06 (2013.01 - EP US); G01N 33/182 (2013.01 - EP US)
Citation (search report)
- [A] EP 0777120 A2 19970604 - EBARA CORP [JP]
- [A] DE 3217987 A1 19831117 - KUNZ GERHARD
- [A] PATENT ABSTRACTS OF JAPAN vol. 018, no. 031 (P - 1677) 18 January 1994 (1994-01-18)
- See references of WO 0057165A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 0057165 A1 20000928; AU 2829300 A 20001009; DE 60029575 D1 20060907; DE 60029575 T2 20070809; EP 1167954 A1 20020102; EP 1167954 A4 20020918; EP 1167954 B1 20060726; JP 3704289 B2 20051012; US 6686751 B1 20040203
DOCDB simple family (application)
JP 0001326 W 20000306; AU 2829300 A 20000306; DE 60029575 T 20000306; EP 00906709 A 20000306; JP 2000606990 A 20000306; US 92619501 A 20010921